Dry cell



H. R. DAM.

DRY CELL. APPLICATION FILED .IUNEZI. 1920.

1,407,386. Patented Feb; 21, 1922.

oierrao stares PATENT @FJFIIQE.

HENRY ROSENDAL DAM, OF BROOKLYN, NEW YORK, ASSIGNOR T'O INTERSTATE ELEG- TBIC NOVELTY COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW CELL.

Specification of Letters Patent.

Patented not. 21, 1922.

Application filed. June 21, 1920. Serial No. 390,306.

i so that no portion of their normal life will be wasted.

The invention is particularly applicable to a cell provided with an outer tubular zinc anode and having an inner bobbin cathode consisting of a carbon electrode embedded in a depolarizing mass.

One object of this invention is to so construct a dry cell that the electrodes while inactive will be separated from one another, by impervious material. Another object is to construct a cell in such a manner the parts can not be-jammed into a position,

from which it would be diflicult to remove them when it is desired to put the cells into action.

This and other objects of this invention are set forth in the following description and illustrated in the accompanying drawing in which:

Figure 1 is a sectional view of one embodiment of this invention showing a cell with the parts in their original inoperative positions.

Figure 2 is a view illustrating the general form of'the auxiliary container.

Figure 3' is a sectional vieyv taken on the line 33 of Figure 2.

Referring to the drawings, the carbon electrode 10, or cathode is embedded in the depolarizing mass 11, the latter being secured in place by a cloth container or the like. The carbon electrode, the depolarizing mass and the cloth container will be hereinafter referred to as the bobbin. Spaced from the bobbin and secured thereto bythe wax seal 14, which serves also as an abutment is the insulating tube 13, which extends the full length of the bobbin. Upon the lower face of the seal 14, or abutment, there is preferably disposed a washer 15 formed of non-conductive impervious mailzelrgial, such as paraffined cardboard, or the The other electrode of the cell comprises a cylindrical zinc cup 16 or anode open at the top and which is adapted to fit inside the insulating tube 13 and to be telescoped with the same, the bottom of the zinc cup 16 serving as an abutment.

Separating and isolating the zinc cup 16 from the bobbin and enveloping the latter is the waterproof fibrous spacing cup 17 which is adapted to co-operate with the wax seal 14, or abutment, and the bottom of the cup 16, the bottom of the cup functioning also as an abutment. The spacing cup 17 is preferably. formed of' non-conductive impervious material such as paraifined cardboard or the like. The length of the spacing cup 17 is greater than that of either of the zinc cup 16 or the insulating tube 13, so that when the spacing member is in position, the upward telescoping movement of the zinc cup 16 with respect to the bobbin and tube 13 will be limited, and the bottom of the zinc cu will be initially maintained projectingan will be readily accessible for convenient manipulation. By means of this construction the zinc cup 16 cannot be forced into a position from which it would be difficult to grasp it for removal, or where it might injure the bobbin, since the bottom of the cup projects below the lower edge of the "insulating tube. The impervious cup '17 initially surrounds the bobbin 10 and prevents moisture salts and other chemicals which may be initially contained in the depolarizing mass from escaping'therefrom and injuring the zinc cup 16.

Moreover the cup may also serve to accurately centre the bobbin within the sur rounding sleeve 13 during the manufacture of the cell, as for example while the wax seal 14 is being applied.

While I have shown a spacing andisolating member consisting of the cup 17 closed at the bottom I may also employ a strip of impervious material rolled around the bobbin in form of a cylinder with overlapping edges and I may close the bottom with a washer. I prefer however to employ impervious spacing cup 17 If desired, a cover 21 of cardboard or other suitable material may be employed to protect the exposed lower end of the zinc cup. This cover 21 end, and temporarily sealed at its flattened end by folding the tube, as shown at in Figure 2.

When it is desired to prepare the cell for 4 use, the zinc cup 16 is removed from the tube 13 and the spacin cup; 17 is removed. To activate the cell, the paste 18 is then squeezed from its celluloid container 19 into the bottom of the zinc cup. The bobbin and the cup 16 are then telescoped into operative position, forcing the paste up between the two electrodes. In this operation, the zinc cup '16 is forced up until its bottom is flush with the bottom of the insulating--tube 13,.so

that when fully assembled the cylindrical.

portion of the zinc cup is entirely surrounded by the insulating tube.

In carryin out this invention it is to be understood t at it is not to be limited by the example herein disclosed but may be practiced in various other ways within its general scope.

Having thus described my invention what I claim is:

1. A dry cell comprising a telescoping covering member, an electrode, a telescoping electrode surrounding the first named electrode and adapted to slide within said covering member, and a spacin element located within said telescoping fiectrode and having its opposite ends contacting with said telescoping covering and with said telescoping electrode toretain the telescoping electrode in an extended relation with respect to said telescoping covering.

2. A dry cell comprising a telescoping covering member havlng a closure, an-electrode, a telescoping electrode surrounding the first named electrode and adapted. to slide wlthm said covering, the telescoping electrode being provided with a closure, and a spacing element arranged within the second named electrode and normally contacting with said closures, whereby the secondnamed electrode is retained in an extended relation with respect to said covering memher.

3. A dry cell comprising a tubular telescoping covering member, having a closure, a bobbin connected with said closure, a telescoping electrode surrounding the'bobbin and adapted to slide within said covering member, and a cylindricalspacing member located within said telescoping electrode,

the spacing member having one end abut tingsaid closure and its opposite end abut ting a portion of said telescoping electrode, whereby the telescoping electrode is retained in an extended position with respect to said covering member.

4'. d cell comprising a covering member, an abutment carried by the covering member, a bobbin, a telescoping electrode surrounding said bobbin and adapted to slide within said covering member, said electrode being provided with an abutment,

and a spacing member arranged within said electrode and having its ends co-operating with said abutting members, whereby said telescoping electrode is retained in an extended relation with respect'to said covering member. I

5. A dry cell comprising a tubular covering member, a cup-shaped electrode arranged within said covering'memben and adapted to slide therein, said cup-shaped electrode being provided with a bottom, a closure for said covering member, .a ho bin arranged within said cup-shaped electrode and spaced from the cup-shaped electrode, and a spacing element disposed within the space. afiorded between the bobbin and the cup-shaped electrode, the spacing element co-operating with said closure and the bottom of the cup-shaped electrode to retain the cup-shaped electrode in an extended relation with respect to said covering member.

In testimony whereof, I have afiixed my signature to this-specification.

HENRY ROSENDAL DAM. 

